They may not have been the first Europeans to visit North America.
A
We must not have been invited to the party.
almost certain
Someone must have forgotten to lock the door
A
Their ships could have been destroyed in a huge storm.
P
All these trees / couldn’t / cut down / recently
All these trees couldn’t have been cut down recently
The flight must have been cancelled.
almost certain
Dinner at your aunt’s house had to have been good.
A
Someone must have forgotten to lock the door
almost certain
The flight must have been cancelled.
P
Your sweater might have been found after we left the restaurant.
not certain
The building / had to / design / by a German architect
The building had to have been designed by a German architect.
She must have missed the early train.
A
This desk / might / make / in the seventeenth century
This desk might have been made in the seventeenth century
Their ships could have been destroyed in a huge storm.
not certain
We must not have been invited to the party.
P
She must have missed the early train.
almost certain
Your daughter / could / drive / to school by her brother
Your daughter could have been driven to school by her brother.
They may not have been the first Europeans to visit North America.
not certain
My car / must / steal / very late last night
My car must have been stolen very late last night.
Our conversation / might not / record
Our conversation might not have been recorded.
Dinner at your aunt’s house had to have been good.
very certain
Your sweater might have been found after we left the restaurant.
P